package classign.election.kingvar.come.electionclasssign.tools.views;

import android.support.v4.view.ViewPager;
import android.view.View;

/**
 * Created by recker on 16/5/11.
 */
public class ZoomOutPageTransformer implements ViewPager.PageTransformer  {
    private static final float MIN_SCALE=0.85f;
    private static final float MIN_ALPHA=0.5f;
    private static final float MAX_ROTATE=30;
    @Override
    public void transformPage(View page, float position) {
        float scaleFactor=Math.max(MIN_SCALE,1-Math.abs(position));
        float rotate=20*Math.abs(position);
        if (position<-1){

        }else if (position<0){
            page.setScaleX(scaleFactor);
            page.setScaleY(scaleFactor);
            page.setRotationY(rotate);
        }else if (position>=0&&position<1){
            page.setScaleX(scaleFactor);
            page.setScaleY(scaleFactor);
            page.setRotationY(-rotate);
        }
        else if (position>=1) {
            page.setScaleX(scaleFactor);
            page.setScaleY(scaleFactor);
            page.setRotationY(-rotate);
        }
    }


/*

    private static final float MIN_SCALE = 0.85f;
    private static final float MIN_ALPHA = 0.5f;

    private static float defaultScale = 0.85f;

    public void transformPage(View view, float position) {
        int pageWidth = view.getWidth();
        int pageHeight = view.getHeight();

        if (position < -1) { // [-Infinity,-1)
            // This page is way off-screen to the left.
            view.setAlpha(0);
            view.setScaleX(defaultScale);
            view.setScaleY(defaultScale);
        } else if (position <= 1) { // [-1,1]
            // Modify the default slide transition to shrink the page as well
            float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
            float vertMargin = pageHeight * (1 - scaleFactor)/2 ;
            float horzMargin = pageWidth * (1 - scaleFactor) /2;
            if (position < 0) {
                view.setTranslationX(horzMargin - vertMargin / 2);
//                view.setTranslationX(horzMargin - vertMargin );
            } else {
                view.setTranslationX(-horzMargin + vertMargin / 2);
//                view.setTranslationX(-horzMargin + vertMargin);
            }

            // Scale the page down (between MIN_SCALE and 1)
            view.setScaleX(scaleFactor);
            view.setScaleY(scaleFactor);

            // Fade the page relative to its size.
            view.setAlpha(MIN_ALPHA +
                    (scaleFactor - MIN_SCALE) /
                            (1 - MIN_SCALE) * (1 - MIN_ALPHA));

        } else { // (1,+Infinity]
            // This page is way off-screen to the right.
            view.setAlpha(0);
            view.setScaleX(defaultScale);
            view.setScaleY(defaultScale);
        }
    }
*/


}
